furman



(N0 M01181. 1 2 Sheets-Sheet 1.

P. J. FURMAN.

v STEAM HEATER. 110. 421,262. Patent-ed Feb. 11, 1890.

M Znesses lnz/enior Fredric JFurm an (No Model.)

' 2Sheets-.-Sheet2.

F. J. FURMAN.

STEAM HEATER.

Patented Feb. 11, 1890.

m'fnesseslnw/erfior" Fredric J. 'urm m B hiss/71107 7299 'UNITED STATES PATENT FREDRIO J. FURMAN, OF GENEVA, NE YORK, ASSIGNOR TO THE HEREN- DEEN MANUFACTURING COMPANY, OF SAME PLACE.

STEAM-H EATER.

SPECIFICATION forming part of Letters Patent No. 421,262, dated. February 11, 1890.

' Application filed July 1, 1889. Serial No. 316,123. (No model.)

To all whom it may concern:

Be it known that I, FREDRIC J FURMAN, a citizen of the United States, residing at Geneva, in the county of Ontario and State of New York, have invented certain new and useful Improvements in Steam-Generators, of which the following is a specification.

Of the accompanying drawings, Figure 1 is a sectional view of my improved generator on the line 1 y, Fig. 2. Fig. 2 is a sectional view on the line as to, Fig. 1. Fig. 3 is a sectional elevation on the line a 5, Fig. 2. Fig. 4. is a plan view of the steanrgenerator.

My invention consists of certain improvements in the construction of steam-generators, as hereinafter fully described.

I preferably construct my improved genertor in a rectangular form, as shown in the drawings, within a setting of brick.

A is the brick wall, which, as shown in the drawings, forms the back and sides of the heater. In the construction of boilers of large capacity it has been found that the large steam-domes were exceedingly hard to cast and from their great size difficult to han dle. I overcome this obstacle by the employmentof a series of smaller steam and water domes (J, placed side by side, each of which is connected with a small common steam-dome B 011 the top of the heater.

H is the ash-pit at the bottom of the generator, covered by the grate I, which is of any desired construction.

The fire-pot is formed by a series of watercirculatory tubes Pen all four sides, arranged closely together, and preferably of elliptical or oblong section, so as to present a broad heating-surface to the direct flame. These tubes rest upon the base-plate P around the grate l, the tubes being screwed at their upper ends into the domes 0. I11 addition to the long circulatory tubes P, forming the sides of the fire-pot, I employa series of drop-tubes R, which are constructed in a similar manner to the long tubes 1?, and like them are screwed at their upper ends into the bottom of the sectional domes C, but which are suspended over the fire-pot, as shown in Figs. 1 and 8, thus presenting much additional heating-surface.

I preferably make the sectional domes G of ,trapezoidal shape in cross-section, so that .jthey are wider at the top than at the bottom, .as clearly shown in Fig. 1, tapering inward ,from top to bottom.

hen thus constructed, there remains a wedge-shaped space between the domes throughout their length, although 'their top edges are in contact with each other.

tween the tubes P, as indicated by the arrows,

come in contact with the wall formed by a series of larger elliptical tubes S, placed preferably in contactend to end, but having spaces formed between the tubes near the upper end of the same by reason of cylindrical tops S through which spaces the said products of combustion pass, thence downward and around a second series of drop-tubes T, depending from the rearmost dome beyond the limits of the fire-pot, of similar construction to the tubes R, but preferably larger, and placed in contact end to end, like the tubes S. After passing around this latter series of tubes the waste gases escape directly up the chimney-flue F. In this manner the greatest possible amount of heat is utilized in generating the steam. The sectional steam and water domes G are connected together by means of the watertubes M, which enter the domes near the bottom of the same.

WVater of condensation is conveyed to the sections formed of the steam and water domes O and the circulatory tubes connected thereto by means of the pipe T which communicates preferably with each of the drop-tubes T, and by means of the tubes M connecting the sectional domes together near the bottom of the same, water is maintained at an accurate level in all of the sections. The pipe T is moreover provided with one or more blow-off cocks t in order to remove whatever sediment collects in said droptubes. From the construction and position of the circulatory tubes, which are preferably made with a diaphragm ,through the grate.

b, reaching nearly to the bottom of the same, a vigorous circulation of water is kept'up in the direction of the arrows shown therein, and the steam which accumulates in the steam-spaces of the domes 0 passes therefrom through the conducting-pipesD D, leading from each of the sectional steam and water domes into the common steam-dome B, situated on the top of the generator, from which it passes outward through the tubes E to the circulatory radiating system. A draft 1s maintained by means of air entering the aslrpit through the door N and passing up A series of holes 70 are made in the base-plate P outside the circulatory tubes P, and beneath these rows of perforations are placed, at the two sides and rear, the similarly-perforated dust-siftin g bars K K, so arranged, by means of pivoted handlebars K or otherwise, that a back-and-forth movement may be given to the sitters, whereby dust, ashes, clinkers, &c., falling beyond the limits of the grate I may be sifted through the dust-sitters and thus be removed.

Access to the rear of the generator is provided by means of doors G placed on one or both sides, through which the interior may be cleaned.

Many advantages result from the use of a series of small steam and water domes O, instead of one large dome in boilers of large size.

Aside from the convenience of manufacturing, transporting, and handling the dome of larger size, one or more additional sectional domes Owith drop-tubes attached may be added, thus increasing the 1ength. In this manner, with a few other minor alterations such as substituting a larger grate and in creasing the length of the two sides of the brick-settin g Athe size and heatin g-capacity of a heater may be readily increased at any time.

I claim- 1. A steam-generator provided with a series of connected sectional steam and water domes of trapezoidal shape in cross-section, being wider at the top than at the bottom, substantially as and for the purposes described.

2. A steamgenerator having a series of connected steam and water domes of trapezoidal shape in cross-section, in combination with a separate common steam-dome connected therewith, substantially as and for the purposes described.

3. A steam-generator constructed in sec? tions composed of a series of connected steam and water domes O, and elliptical circulatory tubes provided with diaphragms connected therewith, in combination with a separate common steam-dome B, substantially as described.

4. In a steam-generator, a series of steam and Water domes, the rearmost of which is provided with back-tubes T beyond the limits of the fire-pot, in combination with the.

feed-water pipe T, communicating with said back-tubes, and tubes M connecting said sectional domes, whereby water is maintained at a level in all the sections, substantially as described.

In witness whereof I have hereunto set my 

